APA (7th ed.) Citation

Buchsbaum, R. M. (1948). Animals without backbones: An introduction to the invertebrates (2. rev. ed.). Univ. Press.

Chicago Style (17th ed.) Citation

Buchsbaum, Ralph Morris. Animals Without Backbones: An Introduction to the Invertebrates. 2. rev. ed. Chicago: Univ. Press, 1948.

MLA (9th ed.) Citation

Buchsbaum, Ralph Morris. Animals Without Backbones: An Introduction to the Invertebrates. 2. rev. ed. Univ. Press, 1948.